I read that most cartidges can only be refilled a couple of times before the
jets start to malfunction, since they are designed for one-time use. That
seems to be my experience, but I don't do any critical printing and don't
mind if there are some missing tiny lines.
What I hate is refilling a cartridge and then when it still doesn't work all
my ink is in there. I'm going to try to suck out some to see if the storage
medium will release it.